Design of ultra-low and ultra-flattened dispersion single mode photonic crystal fiber by DE/EDA algorithm

Abstract

This paper proposes a combination of differential evolution (DE) and estimation of distribution algorithm (EDA) to design photonic crystal fiber structures with desired properties over the C communication band. In order to determine the effective index of propagation of the mode and then, the other properties of structure, a finite difference frequency domain (FDFD) solver is applied. The results revealed that the proposed method is a powerful tool for solving this optimization problem. The optimized PCF exhibits a dispersion of 0.22 ps nm−1 km−1 at 1.55 µm wavelength with a variance of ±0.4 ps nm−1 km−1 over the C communication band and a nearly zero dispersion slope.